feat(core): add location-scoped config loading

packages/core/src/location-layer.ts

@@ -4,10 +4,12 @@ import { Catalog } from "./catalog"
 import { PluginBoot } from "./plugin/boot"
 
 export class LocationServiceMap extends LayerMap.Service<LocationServiceMap>()("@opencode/example/LocationServiceMap", {
-  lookup: (ref: Location.Ref) =>
-    Layer.mergeAll(Catalog.defaultLayer, PluginBoot.defaultLayer).pipe(
-      Layer.provide([Layer.succeed(Location.Service, Location.Service.of(ref))]),
-    ),
+  lookup: (ref: Location.Ref) => {
+    const result = Layer.mergeAll(Catalog.defaultLayer, PluginBoot.defaultLayer).pipe(
+      Layer.provideMerge(Location.defaultLayer(ref)),
+    )
+    return result
+  },
   idleTimeToLive: "5 minutes",
   dependencies: [],
 }) {}